Which action is appropriate when you find an assembly with missing fasteners?

• A. Do not install; document and replace missing fasteners; re-check torque after replacement.
• B. Install any available fasteners regardless.
• C. Leave it as is and re-check later.
• D. Remove other components to access different fasteners.

Answer: (A)

When you find missing fasteners, the proper response is to replace them with the correct hardware and re-torque after installation. This ensures the assembly develops the intended clamp load and remains secure during operation.

Why this is best: Missing fasteners create an unsecured condition that can lead to loosening, fatigue, or failure of the joint under load. Installing random or any available fasteners could use the wrong size, length, thread pitch, or material, which can prevent proper seating, alter preload, or damage threads. Leaving it unattended or delaying replacement leaves a known safety risk. Documenting the deficiency communicates the issue and tracks the corrective action, while replacing with the specified fasteners guarantees compatibility and proper strength. Re-checking torque after replacement confirms the fasteners have achieved the correct clamping force and seating, accounting for any run-in or seating changes.

Context: Inspection procedures emphasize using the correct hardware, following torque values, and re-verifying after replacement to ensure the assembly meets design and safety requirements. Always inspect for additional missing fasteners and any damaged threads or components, and perform the replacement and torque check per the applicable TO and maintenance guidelines.